Throttling device for steam-cylinders



(No Model.) 2 Sheets-Sheet 1.

THROTTLI NG DEVICE FOR STEAM CYLINDERS.

No. 389,736. Patented Sept. 18, 1888.

WITNESSES I v INT/ENTO Qt -%aa 1 I I, 1 orney4 N) PETERS.Phcto-Uihcgnpbov. Washington. 9.2

(No Model.) 2 Sheets-Sheet 2.

G. W. GISCO.

THROTTLING DEVICE FOR S TEAM GYLINDBRS. No. 8888186 88811888 Sept. 18,1888.

. WITNESSES IJV' 'N, PETERS] Phntn-Lilhogmphqr. Wlihlngmn. n.c.

.NITED STATES PATENT OFFICE.

GEORGE W'ASHINGTON GISCO, OF MONTVALE, NEW JERSEY.

THROTTLING DEVICE FOR STEAM-CYLINDERS.

SPECIFICATION forming part of Letters Patent N 0. 389,736, datedSeptember 18, 1888.

Application filed April2, 1888. Serial No. 269,286. (No model.)

Be it known that 1, GEORGE WASHINGTON OIsoo,a citizen of the UnitedStates, and a resident of Montvale, in the county of Bergen and State ofNew Jersey, have invented certain new and useful Improvements inThrottling Devices for Steam-Cylinders; and Ido hereby declare that thefollowing is a full, clear, and exact description of the invention,which will enable others skilled in the art to which it appertains tomake and use the same.

This invention relates to devices for cutting off the supply ofsteam-cylinders.

The object is to produce a devicefor cutting off the -supply of steam tocylinders independent of the throttle-valve, so that should thethrottle-valve become injured or inoperative from any cause the supplyof steam to the cylinder may be cutoff in the steam-chest, therebyrendering the further admission of steam to the cylinders impossible;furthermore, to produce a device which,while being composed of acomparatively few number of parts,will be so adjusted and arranged as torender it at once efficient and durable in use and comparativelyinexpensive of production.

With these objects in view the invention consists in the combination,with asteam-chest,of a compartment provided with suitable valves,

each valve having a valve-stem connected therewith and passing throughstuffing-boxes secured to the ends of the compartment; furthermore, in adevice for operating the valves to cause them to close simultaneouslywhen desired; and, finally, in the various novel'details ofconstruction, as hereinafter fully set forth.

In the accompanying drawings, forming part of this specification, and inwhich like letters of reference indicate corresponding parts, Figure 1is a side elevation showing the arrangement of the valves, thevalve-stem connected therewith, and the levers for operating the same.Fig. 2 is an end view showing the compartment secured in position on thesteamchest. Fig. 3 is a detail view of draw-bar for operating the devicefrom the cab, and Fig. 4. is a detail view of a device for connectingthe two draw-bars.

Referring to the drawings, A designates a compartment or chamber, madeof any suitable material, but preferably of iron. Within this chamberare placed two valves, B B, which operated from either side of the cab.

are held in proper position by means ofguides or ways I), secured to theinner edges of the compartment by bolts or screws b. Each of thesevalves has respectively a valve-stem, l) I), attached to it, the endsofwhich pass through and work in stuffing-boxes b, secured to therespective ends 12 and b of the compartment or chamber A. To the end b astandard, 0, is secured, which extends some distance above the top ofthecompartment,and hasat its upper end abar orlink, D, pivotedthereto,which connects with a bar, E. I To the lower end of this barispivotedalink,F, which connects'with the valve-stem b, and at a pointabove the standard is pivoted another and a longer link, G, whichconnects with the valve-stem b at the opposite end of the chamber.

H designates a rod, connected at one end to the bar E and at theopposite end to a lever, l, the lower end of which is pivoted to thetread board of the engine. At a point near the center of this rod ispivoted a draw-bar, J',which extends from that point to the cab of theen- "1116.

a It is to be understood that each steam-chest is provided with thecut-off device, and may be It is desirous to so arrange the mechanismthat the steam may be cut off from both sides of the engine at one time.To efiect this, abent rod, K, is employed,which passes over the boiler,and is connected to the rod E, so that should the lever J be pulled backon either side of the cab the valves in each of thechambers will beclosed simultaneously.

The mode of operation is as follows: Theengineer, on seeing anyapproaching danger, draws the lever J back to the position shownindottedlines in Fig. 3. This pulls the bar E back, which, being fulcrumedto. the link D, would naturally push the valves 1) b in the directionindicated by the arrows, and this cuts off the supply of steam to thesteam-chest.

Having thus fully described my invention,

what I claim as new, and desire to secure by 2. In a device for cuttingoff the supply of I rod H, and the drew-bar J, extending frorn the steamto the cylinders of engines, the comhinw lever I to the cab of theengine, substantially tion of the bar E, the rod H, pivoted thereto, asdescribed. and the bent lever K,for connecting the levers In testimonythatIelai hi the foregoing asany :5 on each side of the boiler,substantially as deown I have hereunto affixcd my signature in scribed.presence of two witnesses.

3. The combination of the bar E, the rod H, pivoted thereto, the bentlever K,for connecting the levers on each side of the boiler, the leverI, pivoted at its lower end to the treadbonrd of the engine and atitsupper end to the GEORGE \VASHINGTON GTSCO.

Ni t n esses:

H. F. BAUER. JOSEPH J AY (llsco.

